TMUX7219M: What does I_DC represent?

Hi Lauren, 

That's neither the supply current for VSS or VDD. Those are in the electrical characteristics table under IDD and ISS.

I_DC or "Continuous current per channel" is referring to the max current that can be passed through the switch. It's also called the "Source or Drain Continuous Current" in the datasheet.
The switch, when ON, acts as a passive low resistance pathway. The IDC spec tells us how much current can go through the pathway before we damage the switch.

Thanks!
Rami

There is no difference.

As far as I can see, I_DC is a recommended operating condition.

Hi Lauren,

They are the same. I_DC gives the recommended condition. +10% to the I_DC is the abs max for what the switch can see. 

Hi Lauren,

I'm not sure where the confusion is here. Abs max will be above the recommended always.
Recommended is I_DC. Abs max is I_DC + 10%. So for example, for a 44V single supply 44V case at 25C the recommended is 330mA. The abs max would be 330 + 10% of 330 = 363mA.

-Rami

No worries, totally understand. It's done a little differently than how we usually spec our datasheets out.

Thanks!
Rami